Using tweens with transitions: Custom tweens with a custom attribute.
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April 26, 2016 12:45
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tweens
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<title>tween</title> | |
<body> | |
<script src="//d3js.org/d3.v3.min.js"></script> | |
<script>d3 || document.write('<script src="../d3.min.js"><\/script>')</script> | |
<script> | |
var width = 960, | |
height = 500; | |
var n = 0; | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
var info = d3.select("body").append("div") | |
.style({ position: "absolute", top: "50px", left: "50px", | |
"font-family": "sans-serif", "font-size": "30px" }) | |
svg.append("g") | |
.attr("transform", "translate(" + (width / 2) + "," + (height / 2) + ")") | |
.append("path") | |
.attr("d", d3.svg.symbol().type("cross").size(10000)) | |
.each(cycle); | |
function cycle() { | |
n++; // increment cycle counter | |
d3.select(this).transition() | |
.duration(10000) | |
.attrTween("my-tween", myTween) | |
.attrTween("transform", function() { return d3.interpolateString("rotate(0)", "rotate(720)"); }) | |
.each("end", cycle); | |
} | |
function myTween() { | |
// i increments every time the tween is called, from wherever it's called | |
var i = 0; | |
// return the tween | |
return function(t) { info.html(n + "<br>" + i++ + '<br>tween t: ' + d3.format(".3f")(t)) }; | |
} | |
</script> |
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